ggplot_addcrosshairs: Add datapoints/crosshairs to an existing plot

In GJMeijer/soilmech: R functions and plots for Soil Mechanics teaching

Add datapoints/crosshairs to an existing plot

Description

Function takes an existing ggplot and add points and/or crosshairs to the plot to show the position of points

Usage

ggplot_addcrosshairs(
  plt,
  x,
  y,
  group = NULL,
  legend_title = NULL,
  legend_position = "none",
  crosshairs = TRUE,
  add_colour_scale = FALSE,
  xlim = 0,
  ylim = 0,
  arrow_x = TRUE,
  arrow_y = TRUE,
  arrow_length = 0.1,
  palette = "Set1",
  label_size = 4,
  label_hjust = 0,
  label_vjust = 0,
  label_nudge_x = 0,
  label_nudge_y = 0,
  label_parse = FALSE
)

Arguments

plt	a ggplot object
x	x-coordinates for all points
y	y-coordinates for all points
group	names of group, for all points - this is plotted in the label
legend_title	title for legend
legend_position	legend position. If 'NULL', no legend is drawn
crosshairs	if 'TRUE', plot crosshairs for each data point
add_colour_scale	if 'TRUE', add new color scale for different crosshairs
xlim	start point of x crosshairs
ylim	start point of y crosshairs
arrow_x, arrow_y	if 'TRUE', point x or y-arrows towards the point. If 'FALSE', points towards the axis
arrow_length	length of arrow heads
palette	RColorBrewer color palette to use
label_size	text size in label
label_hjust	horizontal justification of labels
label_vjust	vertical justification of labels
label_nudge_x	x-offset of labels
label_nudge_y	y-offset of labels
label_parse	if 'TRUE', parse label text

GJMeijer/soilmech documentation built on May 22, 2022, 10:39 a.m.